When this constant is set to 1, passing an invalid address to the stMemoryFree function is handled safely; the function will simply return FALSE, and the last error code will be set to ERR_INVALID_MEMORY_BLOCK. This constant defaults to 1. However, using the safe memory release method increases the time required for memory allocation and deallocation. To improve performance, ST_USE_SAFE_MEMORY_FREE may be set to 0, which disables address validation. When disabled, passing an invalid address to stMemoryFree will result in unpredictable behavior and may cause the system to hang.